A203457 Number of nX5 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

1, 63, 3748, 143936, 5660631, 231588325, 9441977403, 385259518988, 15769361994812, 645761085331412, 26436118387761701, 1082201755675241681, 44303475359100889481, 1813730483493212443443, 74252023311120691422496

Offset

1,2

Comments

Column 5 of A203460

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..2..2..2..2..0....0..0..1..1..0....1..2..2..1..0....2..2..2..2..2
..2..1..0..2..1....1..1..1..1..1....1..2..2..2..0....2..1..2..0..2
..2..0..0..2..2....1..1..2..2..1....2..2..0..2..0....2..2..2..0..2
..2..2..2..1..2....2..2..2..2..2....2..0..2..2..1....0..1..2..0..2
..1..1..2..2..2....2..2..0..2..2....2..2..2..2..1....0..0..2..2..2

Crossrefs

Sequence in context: A273437 A069381 A051589 * A258684 A180926 A267963

Adjacent sequences: A203454 A203455 A203456 * A203458 A203459 A203460

Keyword

nonn

Author

R. H. Hardin Jan 02 2012

Status

approved